DR Jose,
Michelle and Yu-Na skated in different eras (Michelle skated in one world championship during the currently used points system and finished fourth), and the long programs of Michelle's era didn't require this strict standard of point-seeking jump combinations, lengthy footwork sequences, and transitions leading into and out of jumps. So it's almost apples and oranges in watching the content of their programs. As for skating ease and mastery, I don't know. For me Michelle is the gold standard, but I have seen so much more of her than Yu-Na, so my comparisons are probably not fair.
And I've only seen this Olympic gold performance once, so my judgment of her on a single look at her long program is DEFINITELY not fair. I've seen those medal-winning skates of Michelle's dozens of times.